MHATT-CAT Useful Operational Data for Run 1 of FY03, Dec. 2002

Eric Dufresne, Dohn Arms, Don Walko
MHATT-CAT
Started Dec. 2, 2002
(www.mhatt.aps.anl.gov/~dufresne/optics/FY03_run1/Dec.html)

• Previous data from October 2002
• Previous data from Nov. 2002
• Data taken during the multibunch study on Dec. 10, 2002..
• 2D focussing in 7ID-C with two perpendicular Li lenses!

Tuesday, Dec 10, 2002. Data taken by Bernhard Adams (APS) in 7ID-D during the multibunch tests with an APD looking at the reflected beam from a mirror. The mono was set to approx. 10.367 keV.

During the machine study period on 12/10, the APS ran with every four buckets
filled, thus 1296/4 = 324 singlets separated by 11.2 ns spacing. The test lasted
from 8 am to 11 am and Bernhard Adams (APS) took some data in 7ID-D with an APD.
The reflected beam from a mirror measured by an APD is shown below in 8 screen 
shots of a fast digital oscilloscope. The first seven screen shot have the same
gain on the APD (pictures 1-7) (gain 2.518 V) while for the last one the gain
was reduced to 1.308 V.  The purple trace is the APD data, the green trace a
signal related to P0, the ring rotation period. Typically, several traces were
averaged to improve the signal.

Fig 12-10.1. Oscilloscope screen shot in multibunch mode #1. See figure for details.

Fig 12-10.2. Oscilloscope screen shot in multibunch mode #2. See figure for details.

Fig 12-10.3. Oscilloscope screen shot in multibunch mode #3. See figure for details.

Fig 12-10.4. Oscilloscope screen shot in multibunch mode #4. See figure for details.

Fig 12-10.5. Oscilloscope screen shot in multibunch mode #5. See figure for details.

Fig 12-10.6. Oscilloscope screen shot in multibunch mode #6. See figure for details.

Fig 12-10.7. Oscilloscope screen shot in multibunch mode #7. See figure for details.

Fig 12-10.8. Oscilloscope screen shot in multibunch mode #8. See figure for details. The gain was lowered here.